use std::io;
use ctap::FidoError;

pub type Fido2LuksResult<T> = Result<T, Fido2LuksError>;

#[derive(Debug, Fail)]
pub enum Fido2LuksError {
    #[fail(display = "unable to retrieve password: {}", cause)]
    AskPassError{ cause: io::Error },
    #[fail(display = "unable to read keyfile: {}", cause)]
    KeyfileError { cause: io::Error },
    #[fail(display = "authenticator error: {}", cause)]
    AuthenticatorError { cause: ctap::FidoError },
    #[fail(display = "no authenticator found, please ensure you device is plugged in")]
    NoAuthenticatorError,
    #[fail(display = "no authenticator found, please ensure you device is plugged in")]
    LuksError { cause: cryptsetup_rs::device::Error },
    #[fail(display = "no authenticator found, please ensure you device is plugged in")]
    IoError { cause: io::Error },
    #[fail(display = "failed to parse config, please check formatting and contents")]
    ConfigurationError { cause: serde_json::error::Error },
}

use Fido2LuksError::*;

impl From<FidoError> for Fido2LuksError {
    fn from(e: FidoError) -> Self {
        AuthenticatorError { cause: e}
    }
}

impl From<cryptsetup_rs::device::Error> for Fido2LuksError {
    fn from(e : cryptsetup_rs::device::Error) -> Self {
        LuksError { cause: e }
    }
}

impl From<io::Error> for Fido2LuksError {
    fn from(e : io::Error) -> Self {
        IoError { cause: e }
    }
}

impl From<serde_json::error::Error> for Fido2LuksError {
    fn from(e : serde_json::error::Error) -> Self {
        ConfigurationError { cause: e }
    }
}